ceramic bearings | ceramic bearings uk | zirconia ceramic bearings

Ceramic bearings in ZrO2 for shaft sizes from 3mm up to 50mm
(See product table below for dimensions and technical drawings)

ZrO2 or zirconium dioxide is a tough ceramic material with very similar expansion properties to steel. This is an advantage when considering shaft and housing fits for higher temperature applications. Although we usually refer to these bearings as ZrO2 bearings, they are actually made from ZrO2 stabilised with yttria (yttrium oxide) which gives the material greater strength and fracture resistance at room temperature. This is sometimes known as YSZ or YTZP. The material is approximately 30% lighter than steel.

The ZrO2 full ceramic ball bearings listed below are available with cages (or retainers) made from PEEK, PTFE or 316 stainless steel. In addition, we keep stock of full complement ZrO2 bearings. These have no cage and extra balls. For the bearings with cages, PEEK cages are generally the option available from stock due to the strength and durability of PEEK. If an alternative cage material is required to cope with particular chemicals or temperature extremes beyond the range of PEEK, these can be produced to order. ZrO2 bearings are not magnetic or conductive and they are highly corrosion resistant to most chemicals. They are also extremely water resistant which is why they are often used in marine applications, particularly where the equipment is fully submerged or where 316 marine grade bearings will not cope with the load or speed. It is important to note that if ZrO2 has prolonged contact with steam or hot water, there may be some weakening of the material over time. 

Full complement ZrO2 bearings or those with a 316 stainless cage can be used up to 400°C. The maximum speed should be decreased as the temperature increases above ambient, particularly if the bearings are unlubricated. Bearings with a PEEK cage are rated up to 250°C due to the lower maximum temperature of the cage material. It may be preferable to use a looser radial play at high temperatures, particularly if the inner ring temperature is likely to be greater than the outer ring temperature as this will reduce the radial play of the bearing. Our ZrO2 bearings are supplied with a looser C3 radial play as standard.

Although PEEK is very durable, it will become more brittle at low temperatures so it is worth considering PTFE or 316 stainless steel cages for temperatures below -70°C. For an overview of the pros and cons of ZrO2 bearings, you can click HERE to see our ceramic bearing selection guide. 

Most of the range of ZrO2 ceramic bearings are supplied from stock in the UK. We also supply full ceramic bearings from stock in silicon nitride. See Products Variants below for the Si3N4 versions.

Click on INFO in the rows below to display technical drawings of the bearings with load and speed data. Please note that the maximum loads and speeds are used in theoretical life calculations. It is recommended to use bearings at significantly less than the maximum load and speed ratings to ensure reasonable bearing life. ZrO2 full ceramic bearings are best used at low speeds. For higher speeds or continuous rotation over long periods, they will perform better with Si3N4 balls.

 

Products Variants
full ceramic bearings | Silicon Nitride Ceramic Bearings

Full Ceramic Bearings in Si3N4

Si3N4

More Information

Product Details ZrO2

BORE

(mm)

O.D.

(mm)

WIDTH

(mm)

SMB REFERENCE

(Open Bearings)

MORE INFO

SMB REFERENCE

(Sealed Bearings)

MORE INFO

3

8

3

CCZR-693

info

 

 

8

4

 

 

CCZR-693-2PKS

info

9

3

CCZR-603

info

 

 

9

5

 

 

CCZR-603-2PKS

info

10

4

CCZR-623

info

CCZR-623-2PKS

info

4

9

2.5

CCZR-684

info

 

 

9

4

 

 

CCZR-684-2PKS

info

11

4

CCZR-694

info

CCZR-694-2PKS

info

12

4

CCZR-604

info

CCZR-604-2PKS

info

13

5

CCZR-624

info

CCZR-624-2PKS

info

16

5

CCZR-634

info

CCZR-634-2PKS

info

5

11

3

CCZR-685

info

 

 

11

5

 

 

CCZR-685-2PKS

info

13

4

CCZR-695

info

CCZR-695-2PKS

info

14

5

CCZR-605

info

CCZR-605-2PKS

info

16

5

CCZR-625

info

CCZR-625-2PKS

info

19

6

CCZR-635

info

CCZR-635-2PKS

info

6

13

3.5

CCZR-686

info

 

 

13

5

 

 

CCZR-686-2PKS

info

15

5

CCZR-696

info

CCZR-696-2PKS

info

17

6

CCZR-606

info

CCZR-606-2PKS

info

19

6

CCZR-626

info

CCZR-626-2PKS

info

22

7

CCZR-636

info

CCZR-636-2PKS

info

7

14

3.5

CCZR-687

info

 

 

14

5

 

 

CCZR-687-2PKS

info

17

5

CCZR-697

info

CCZR-697-2PKS

info

19

6

CCZR-607

info

CCZR-607-2PKS

info

22

7

CCZR-627

info

CCZR-627-2PKS

info

26

9

CCZR-637

info

CCZR-637-2PKS

info

8

16

4

CCZR-688

info

 

 

16

5

 

 

CCZR-688-2PKS

info

19

6

CCZR-698

info

CCZR-698-2PKS

info

22

7

CCZR-608

info

CCZR-608-2PKS

info

24

8

CCZR-628

info

CCZR-628-2PKS

info

28

9

CCZR-638

info

CCZR-638-2PKS

info

9

17

4

CCZR-689

info

 

 

17

5

 

 

CCZR-689-2PKS

info

20

6

CCZR-699

info

CCZR-699-2PKS

info

24

7

CCZR-609

info

CCZR-609-2PKS

info

26

8

CCZR-629

info

CCZR-629-2PKS

info

30

10

CCZR-639

info

CCZR-639-2PKS

info

10

15

3

CCZR-6700

info

 

 

15

4

 

 

CCZR-6700-2PKS

info

19

5

CCZR-6800

info

CCZR-6800-2PKS

info

22

6

CCZR-6900

info

CCZR-6900-2PKS

info

26

8

CCZR-6000

info

CCZR-6000-2PKS

info

30

9

CCZR-6200

info

CCZR-6200-2PKS

info

35

11

CCZR-6300

info

CCZR-6300-2PKS

info

12

18

4

CCZR-6701

info

CCZR-6701-2PKS

info

21

5

CCZR-6801

info

CCZR-6801-2PKS

info

24

6

CCZR-6901

info

CCZR-6901-2PKS

info

28

8

CCZR-6001

info

CCZR-6001-2PKS

info

32

10

CCZR-6201

info

CCZR-6201-2PKS

info

37

12

CCZR-6301

info

CCZR-6301-2PKS

info

15

21

4

CCZR-6702

info

CCZR-6702-2PKS

info

24

5

CCZR-6802

info

CCZR-6802-2PKS

info

28

7

CCZR-6902

info

CCZR-6902-2PKS

info

32

9

CCZR-6002

info

CCZR-6002-2PKS

info

35

11

CCZR-6202

info

CCZR-6202-2PKS

info

42

13

CCZR-6302

info

CCZR-6302-2PKS

info

17

23

4

CCZR-6703

info

CCZR-6703-2PKS

info

26

5

CCZR-6803

info

CCZR-6803-2PKS

info

30

7

CCZR-6903

info

CCZR-6903-2PKS

info

35

10

CCZR-6003

info

CCZR-6003-2PKS

info

40

12

CCZR-6203

info

CCZR-6203-2PKS

info

47

14

CCZR-6303

info

CCZR-6303-2PKS

info

20

27

4

CCZR-6704

info

CCZR-6704-2PKS

info

32

7

CCZR-6804

info

CCZR-6804-2PKS

info

37

9

CCZR-6904

info

CCZR-6904-2PKS

info

42

12

CCZR-6004

info

CCZR-6004-2PKS

info

47

14

CCZR-6204

info

CCZR-6204-2PKS

info

52

15

CCZR-6304

info

CCZR-6304-2PKS

info

25

32

4

CCZR-6705

info

CCZR-6705-2PKS

info

37

7

CCZR-6805

info

CCZR-6805-2PKS

info

42

9

CCZR-6905

info

CCZR-6905-2PKS

info

47

12

CCZR-6005

info

CCZR-6005-2PKS

info

52

15

CCZR-6205

info

CCZR-6205-2PKS

info

62

17

CCZR-6305

info

CCZR-6305-2PKS

info

30

37

4

CCZR-6706

info

CCZR-6706-2PKS

info

42

7

CCZR-6806

info

CCZR-6806-2PKS

info

47

9

CCZR-6906

info

CCZR-6906-2PKS

info

55

13

CCZR-6006

info

CCZR-6006-2PKS

info

62

16

CCZR-6206

info

CCZR-6206-2PKS

info

72

19

CCZR-6306

info

CCZR-6306-2PKS

info

35

44

5

CCZR-6707

info

CCZR-6707-2PKS

info

47

7

CCZR-6807

info

CCZR-6807-2PKS

info

55

10

CCZR-6907

info

CCZR-6907-2PKS

info

62

14

CCZR-6007

info

CCZR-6007-2PKS

info

72

17

CCZR-6207

info

CCZR-6207-2PKS

info

80

21

CCZR-6307

info

CCZR-6307-2PKS

info

40

50

6

CCZR-6708

info

CCZR-6708-2PKS

info

52

7

CCZR-6808

info

CCZR-6808-2PKS

info

62

12

CCZR-6908

info

CCZR-6908-2PKS

info

68

15

CCZR-6008

info

CCZR-6008-2PKS

info

80

18

CCZR-6208

info

CCZR-6208-2PKS

info

90

23

CCZR-6308

info

CCZR-6308-2PKS

info

45

55

6

CCZR-6709

info

CCZR-6709-2PKS

info

58

7

CCZR-6809

info

CCZR-6809-2PKS

info

68

12

CCZR-6909

info

CCZR-6909-2PKS

info

75

16

CCZR-6009

info

CCZR-6009-2PKS

info

85

19

CCZR-6209

info

CCZR-6209-2PKS

info

100

25

CCZR-6309

info

CCZR-6309-2PKS

info

50

62

6

CCZR-6710

info

CCZR-6710-2PKS

info

65

7

CCZR-6810

info

CCZR-6810-2PKS

info

72

12

CCZR-6910

info

CCZR-6910-2PKS

info

80

16

CCZR-6010

info

CCZR-6010-2PKS

info

90

20

CCZR-6210

info

CCZR-6210-2PKS

info

110

27

CCZR-6310

info

CCZR-6310-2PKS

info

Our determination to remain specialised gives us a high level of product knowledge, providing bearing and lubrication solutions to existing or potential customers, whether individuals or large corporations. We don’t just sell bearings, we help to solve your problems. - Chris Johnson, managing director of SMB Bearings.